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martin f krafft wrote:
<blockquote cite="mid20061102090038.GA27284@piper.madduck.net"
type="cite">
<pre wrap="">also sprach Dan Pascu <a class="moz-txt-link-rfc2396E" href="mailto:dan@ag-projects.com"><dan@ag-projects.com></a> [2006.11.02.0946 +0100]:
</pre>
<blockquote type="cite">
<pre wrap="">Yes. In my case, if I fail a drive, it is still there in a failed state,
but if I then stop the raid array, when it's restarted, the failed drive
is no longer there, as if it was removed meanwhile, only that I never
issued the remove command. And when the array starts, it shows that it
started degraded with only 1 out of 2 drives.
</pre>
</blockquote>
<pre wrap=""><!---->
I managed to reproduce it; you just have to write to the array after
fail and before stop:
piper:~# mdadm -Cl1 -n2 /dev/md99 /dev/sd[ef]1
piper:~# mdadm --fail /dev/md99 /dev/sde1
mdadm: set /dev/sde1 faulty in /dev/md99
piper:~# dd if=/dev/zero of=/dev/md99
[...]
65667072 bytes (66 MB) copied, 2.57956 seconds, 25.5 MB/s
piper:~# mdadm -Ss
mdadm: stopped /dev/md99
piper:~# mdadm -As
mdadm: /dev/md/99 has been started with 1 drive (out of 2).
mdadm: /dev/md/99 already active, cannot restart it!
mdadm: /dev/md/99 already active, cannot restart it!
[...]
</pre>
</blockquote>
Martin,<br>
<br>
I'm pretty sure that writing to the failed array is not the cause of
the problem, but more like a trigger. In my case I have never wrote to
the failed arrays during my testing. There was an array I have never
wrote anything to, and in another case there was an array I only wrote
to while it was complete (before failing it).<br>
<br>
But I'm glad you were able to at least see the problem I'm
experiencing. One thing that intrigues me is why in my case when
failing a drive and stopping the array, after restarting it, the failed
drive was already removed (even though I never removed it myself) and
the arrays started degraded with 1 drive out of 2, and in your case the
array started with the failed drive included and reported that it
started with 2 drives.<br>
<br>
<pre class="moz-signature" cols="72">--
Dan
</pre>
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